Packing-ring for piston-rods, &amp;c.



v PATENTED FEB. 17, 1903. L. H- MARTELL. .PAGKING RING FOR PISTON RODS, &0.

APPLICATION FILED AUG. 29, 1902. 1T0 MODEL. 2 SHEETS-SHEET 1.

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No. 720,597. PATENTED FEB. 17, 1903.

I L. H. MARTELL.

PACKING RING FOR PISTON RODS, 6E0.

APPLIGATION FILED AUG. 29, 1902. I N0 MODEL. 2 SHEETS-SHEET 2,

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UNIT D STATES PATENT OFFICE.

LOUIS H. MARTELL, OF WILKINSBURG, PENNSYLVANIA.

PACKING-RING .FOR PISTON-RODS, 84.0.

SPECIFICATION forming part of Letters Patent No. 720,597, dated February 17, 1903.

Application filed August-29, 1902. Serial No. 121,431. (No model.)

To all whom it may concern.-

Be it known that I, LOUIS H. MARTELL, a citizen of the United States, residing at Wilkinsburg,in the county of'Allegheny and State of Pennsylvania, have invented or discovered certain newand useful Improvementsin Packing-Rings for Piston-Rods, &c., of which improvements the following is a specification.

The invention described herein relates to certain improvements in packingrings for piston-rods, &c., of thatclass or kind consisting of two segmental rings, eachsegment being a duplicate of the other and the several segments interlocking or having a bearing upon adjacent segment.

The invention is hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a perspective view of a piston-packingembodying my improvement, one of the segments being Fig. 2 is a plan view, on an enlarged scale, of one of the segments, a portion being broken away. Fig. 3 is a side elevation of the same. Figs. 4, 5, 6, and 7 are views similarto Figs. 2 and 3, illustrating modifications of my improvement.

In the practice of my invention each segment 1 may form a nearly semicircle or other desired portion of a circle and is generally formed of brass or other suitable hard metal. The inner or bearing face is formed in part of Babbitt or other metal suitable for bearing-surfaces by recessing the inner face of the segment and filling said recess with such metal, as at 2. The projection on the side of the segment has heretofore been formed wholly of the samemetal as the filling2 and connected therewith by a tongue 3, extending from the filling 2. This construction is objectionable not only on account of lack of strength, but also on account of thelabor and time involved in the manufacture therefor. In forming these projections'of Babbitt metal it is necessary that the segments be clamped together around a suitable core and the metal poured in. The proper clamping of the segments together involved the formation of radially-projecting ears on the ends of the segments, so as to connect adjacent segments together. After the Babbitt metal had been poured these lugs were cut away and the ends of the segments properly shaped. Dur ing these operations the segments were liable to be bent, and thereby rendered useless.

. In lieu of forming the wedge-like projection entirely of Babbitt or other soft metal I provide two retaining-walls 4,which form the outer side walls of the projection. These retaining or reinforcing walls are preferably formed of the same metal as the body of the segments and are detachably secured in position on the segments by screws or other suitable means. In the construction shown in Figs. 1, 2, 3 the'retaining-walls 4 form parts of hollow wedge-like structures 5, having the inner wall cut away. These wedgelike structures are secured on the segments by screws 6, with their inner or adjacent ends separated a short distance, as shown. Babbitt or other suitable metal is now poured into the structures 5, filling the same and the space between the inner ends thereof and flowing through a suitable channel into the recessin the inner face of the segment forming the bearing-face 2. It will be observed thatin the complete segment portions of the inner faces of the segment proper and the Wedge-like projection are formed in part by Babbitt or good bearing metal, as is also the apex 6 of the wedge-like projection, and that the soft-metal portions of the projection are braced or reinforced by the hard-metal walls 4.

In the construction shown in Figs. 4 and 5 the retaining-walls 4 are provided with lugs 7, whereby the walls may be secured inposition on the segments proper. In this construction the upper and lower sides shown in Figs. 2 and 3 are omitted, the retaining or reinforcing walls being formed of flat plain 9o pieces of metal bearing the lugs 7.

In the construction shown in Figs. 6 and 7the retaining-walls 4 are connected by a narrow web portion 8, through which passes the securing screw. In this construction the 5 retaining-walls are braced one by the other through the connecting-web, which'is made sufficiently light to permit fiexure, so that the two walls may be adjusted relative to each other, as may be required. I

It will be understood that the plain retaining-walls in the construction shown in Figs.

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4 to 6 serve as backings for Babbitt or other soft metal, as in Figs. 1, 2, and 3, and that said walls serve to brace and strengthen the wedge-like projection of which they form a part.

When forming my improvement, the retaining-Walls are secured in position after the segments have been completed, except a light finishing cut, and the projection is completed by placing the segment on a suitable core or convex surface and closing the opening between the adjacent ends of the retaining- Walls and pouring in the Babbitt metal. After the Babbitt metal has been poured in The segments are completed by a light finishing out.

I claim herein as my invention--- 1. A packing-ring consisting of segments, each segment provided with a Wedgelike LOUIS H. MARTELL.

\Vitnesses:

DARWIN S. WOLOOTT, GEO. B. BLEMING. 

